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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef CAFFE_RNG_CPP_HPP_</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#define CAFFE_RNG_CPP_HPP_</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;</div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;iterator&gt;</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;</div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &quot;boost/random/mersenne_twister.hpp&quot;</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &quot;boost/random/uniform_int.hpp&quot;</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &quot;caffe/common.hpp&quot;</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacecaffe.html">caffe</a> {</div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">typedef</span> boost::mt19937 rng_t;</div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="keyword">inline</span> rng_t* caffe_rng() {</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>caffe::rng_t*<span class="keyword">&gt;</span>(Caffe::rng_stream().generator());</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;}</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">// Fisher–Yates algorithm</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> RandomAccessIterator, <span class="keyword">class</span> RandomGenerator&gt;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> shuffle(RandomAccessIterator begin, RandomAccessIterator end,</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;                    RandomGenerator* gen) {</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;  <span class="keyword">typedef</span> <span class="keyword">typename</span> std::iterator_traits&lt;RandomAccessIterator&gt;::difference_type</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;      difference_type;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;  <span class="keyword">typedef</span> <span class="keyword">typename</span> boost::uniform_int&lt;difference_type&gt; dist_type;</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;  difference_type length = std::distance(begin, end);</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;  <span class="keywordflow">if</span> (length &lt;= 0) <span class="keywordflow">return</span>;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;  <span class="keywordflow">for</span> (difference_type i = length - 1; i &gt; 0; --i) {</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    dist_type dist(0, i);</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    std::iter_swap(begin + i, begin + dist(*gen));</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;  }</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;}</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> RandomAccessIterator&gt;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> shuffle(RandomAccessIterator begin, RandomAccessIterator end) {</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  shuffle(begin, end, caffe_rng());</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;}</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;}  <span class="comment">// namespace caffe</span></div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#endif  // CAFFE_RNG_HPP_</span></div><div class="ttc" id="namespacecaffe_html"><div class="ttname"><a href="namespacecaffe.html">caffe</a></div><div class="ttdoc">A layer factory that allows one to register layers. During runtime, registered layers can be called b...</div><div class="ttdef"><b>Definition:</b> blob.hpp:14</div></div>
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